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Rapid discrimination of crystal handedness by XNCD mapping

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorCORTIJO, Miguel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorVALENTÍN-PÉREZ, Ángela
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorROGALEV, Andrei
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorWILHELM, Fabrice
hal.structure.identifierInstitut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
dc.contributor.authorSAINCTAVIT, Philippe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROSA, Patrick
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorHILLARD, Elizabeth Anne
dc.date.issued2020
dc.identifier.issn0947-6539
dc.description.abstractEnAn original method for determining the handedness of individual non‐centrosymmetric crystals in a mixture using a tightly‐focused, circularly polarized X‐ray beam is presented. The X‐ray natural circular dichroism (XNCD) spectra recorded at the metal K‐edge on selected crystals of [Δ‐M(en)3](NO3)2 and [Λ‐M(en)3](NO3)2 (M=CoII, NiII) show extrema at the metal pre‐edge (7712 eV for Co, 8335 eV for Ni). A mapping of a collection of some 220 crystals was performed at the respective energies by using left and right circular polarizations. The difference in absorption for the two polarizations, being either negative or positive, directly yielded the handedness of the crystal volume probed by the beam. By using this technique, it was found that the addition of l‐ascorbic acid during the synthesis of [Co(en)3](NO3)2 resulted in an enantiomeric enrichment of the Λ‐isomer of 67±13 %, whereas the Ni analogue was similarly, but conversely, enriched in the Δ‐isomer (65±22 %).
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enChirality
dc.subject.enConglomerate crystallization
dc.subject.enCoordination chemistry
dc.subject.enX-ray absorption
dc.subject.enX-ray optical activity
dc.title.enRapid discrimination of crystal handedness by XNCD mapping
dc.typeArticle de revue
dc.identifier.doi10.1002/chem.202001783
dc.subject.halChimie/Chimie de coordination
dc.subject.halChimie/Cristallographie
bordeaux.journalChemistry - A European Journal
bordeaux.page13363-13366
bordeaux.volume26
bordeaux.issue59
bordeaux.peerReviewedoui
hal.identifierhal-02945207
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02945207v1
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